์๋ ํ์ธ์, ๊ฐ์์ ๋๋ค. ์ค๋์ Extension์ ๋ํด์ ๊ณต๋ถํด๋ณธ ๋ด์ฉ์ ์ ๋ฆฌํ์ด์. ๊ทธ๋ผ ์์! Swift Document chap.21 Extension ๋ฐ๋ก๊ฐ๊ธฐ Extensions — The Swift Programming Language (Swift 5.6) Extensions Extensions add new functionality to an existing class, structure, enumeration, or protocol type. This includes the ability to extend types for which you don’t have access to the original source code (known as retroactive modeling). Exten..
